I can let any spelling mistake or grammatical murder slide except this one. I won't comment on it as that's a bit petulant, but I will seethe inside and often,

I can let any spelling mistake or grammatical murder slide except this one. I won't comment on it as that's a bit petulant, but I will seethe inside and often, almost without thinking, I'll disregard whatever else they wrote. Silly I know!